Blue Zones are regions of the world where people have a much higher likelihood of reaching a centenarian age than average. It is estimated that in 2015 the world was home to nearly half a million centenarians, and this number is expected to increase to around 3.7 million by 2050. In 2014, an estimated 72,197 centenarians were alive in the United States, up 43.6% since 2000. In recent years, studies on the factors influencing survival to 100 years have increased dramatically. However, several gaps in our knowledge persist regarding the demographic, environmental, and social contributors to becoming a centenarian. These gaps include factors such as walkability, access to health care, the percentage of working age population by neighborhood, among others.
This study aims to identify Blue Zones in Washington State by examining the likelihood of becoming a centenarian for adults aged 75 and above and to identify social and environmental correlates of healthy aging and longevity.
Washington State Blue Zones
Correlates of Reaching Centenarian Age
Decedents reaching centenarian age (2011 -2015):
2698 (1.8% of deaths >75 years old)
Health Care Access
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Municipalities by Centenarian Prevelance
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